I just saw this and replied on another forum, but we're blessed in the tech and cave diving communities to have some of the bravest, interesting and unique people that we sometimes get to meet and know.
At a NACD seminar some years ago, Tom and I somehow got into a quick discussion about religion, DNA and genealogy. He was blowing my mind with some of his comments and insights.
I remember seeing a photo of Tom taken in the 1970s I believe at some martial arts event. Tom was wearing just jeans and had long hair. He reminded me of a combination of Jacques Cousteau, Bruce Lee and the Billy Jack character.